Antivirus software (Avast free v5) icon crossed on desktop meaning it's disabled. Opening console and clicking Fix doesn't restart the program. Also having web pages open by themselves. Tried uninstalling and reinstalling Avast - won't restart. Removed avast then ran MBAM - found multiple viruses including Backdoor.bot, Trojan.2bot, Security.hijack, Malware.trace and Hijack.userinit. Used MBAM to remove these and rebooted - some required rebooting to delete. Then reinstalled Avast - same problem. Currently running MBAM full in safe mode but worried problems aren't fixed. Help appreciated.